Upright gas-lamp



1. 1. ROBIN.

UPRIGHT GAS LAMP.

APPLICATION FILED DEC.H,1919.

1 3 5 l 1 28 Patented Aug. 31, 1920.

UNITED sraras FFICE.

JACOB I. ROBIN, NEW YORK, N. Y.

UPRIGHT GAS-LAMP.

Application filed December .1.1, i919.. `Serial No. 344,079.

To all wwm t may concern lie it known that l. Japon i. Ronin, a citizen of the United States of America, re* siding at Park avenue, 130th street, New York, in the county of New York'and State of N ew York, have invented certain new and useful Improvements in Upright Gas- Lamps, of which the following is a specifi`- cation.

The present invention relates to upright incandescent gas lamps and has for its prin-V cipal object to simplify the construction of the burner and incandescent mantle and to enable the use of a rag or limp mantle on upright burners for ordinary city gas pressure.

l/Vhile for inverted burners for ordinary city gas pressure the use of limp or rag mantles have for a considerable time been in general use in preference to shaped mantles by reason of the-greater convenience of handling and shipping of the former, the use of limp nia'ntles for upright burners has presented almere or less difficult problem. lilith burners of the hitherto used construction the `mantles require certain supports which engage the top of the mantleA and in consequence of which dark or non-illuminated parts around the flame are produced. These supports also are objectionable because of the increase of the cost of mannfacture.

Another objection to this old construction is that in order to afford an exit for the combustion gases the top of the mantle must be open and cannot be utilized for illuminating purposes.

Moreover, limp mantles could not be used with the burneras hitherto constructed for ordinary city gas because the pressure of the gas mixture issuing from the top of the burner is directed only upwardly and is not strong enough to properly shape the mantle.

To obviate the drawbacks my invention consists. in an upright gas lamp in which the burner is so constructed that a top closed limp mantle slipped over the top of the burner will, on ignition, properly shape itself Vand produce an uninterrupted and uniformly illuminated surface around and.

above the flame.

Owing to new construction any fastening means for the mantles such as magnesia rings or the like are entirely eliminated, so that not only is the manufacture of the mantles greatly simplied, but the packing and shipping and handling thereof by the consumer are rendered very convenient, and vwaste duetto breakage is minimized.

To make my invention more clear the same is illustrated in the accompanying drawing, in which similar' referencev characters Udenote corresponding partsand in which Figure l is an elevation of my` lamp, Fig. 2, an enlarged cross section on line 2 2 of 1,'Fig. 3, top plan view of the burner tube, Fig. i, an elevation of a part of the burner showing a modiiied construction and Fig. '5, a vertical section of a part of another modilied burner and of a limp mantle seated thereon.

lThe new lamp comprises the usual Bunsen a of well known construction, a burner tube Z) and a limp or rag mantle c. `he burner tube 7; which is adapted to be removably mounted on the Bunsen tube a is closed on its top or dome shaped and provided with small central perforations l therein, and with a plurality of small openings al in the circumferencev of the `upper part thereof.

The circumferential openings are` uniformly distributed in Vsubstantially equidistantly arranged vertical rows. The limp or soft mantle c which has an entirely closed top is advantageously!made flaring downwardly and long enough to proj ect below the lower-most row of perforations. The object of making it flaring is to provide a large enough free space around the burner tube, enabling an unobstructed passage for the combustion gases and also to provide a sutliciently `large opening through which the burner tube may be freely passed without touching the mantle. y The'reason for mirking the mantle longer than the perforated part of the burner is to confine the flames within the mantle. p

The rag mantle is made of suoli a size and so chemically treated that when burntoi'll by the consumer it will contract to a size suitable for the particular size burner.

ln use, the mantle is slipped over the burner so as to rest with its top on top of the burner tube. It is then burnt ofi' and after opening the gas cock and on ignition, the flames of the burning gas jets will be directed against the mantle, producing an uninterrupted incandescent surface surrounding the flame from the sides and top.

rl`he top of the burner is made to conform in shape as much as possible with the shape of the top of the mantle and is therefore conmantle flaring' in order to enable its beingv veX and formed with rounded edges, so that the mantle will, when slipped over it or taken off, not be apt to be damaged and will find a smooth rest thereon. lVhile the burner is in operation the top llame, by its pressure, willraise the mantle whose weight is negligible from the burner.V

and hold it practically suspended intheair, as a result of which dark spots, which would occur at points'of contact withthe burner,

ywill be avoided.

inasmuch as it is desired tomalie the limp readily and'quickly p ut over and removed from the burner tube,thejiiames must be made tof vary ,in length finV accordance with l the lia-re of the mantle in order to enablethe mantle toexvtend through like zones of the,

' itself on top of the burner tube when slippedr over it, the bunch c on the inner surface of the top of the mantle, which is-formed byY drawing the "ends of the threads together when closing the top, is utilized.v This bunch is stiffened by tying around it a thread or thread c2 (Fig. This stiffened bunch is adapted to enter a crater ordepression e', which Iform' in the burner top e when the mantle is slipped over the latter. The bunch c will also serve to hold the mantle surface out of touch with the burner tube, so as to prevent injury to the mantle, and avoid dark or non-illuminated spots.VV

To insure incandescence of the top of the mantle a plurality ofr burner openings e2 around the crater e of the burner may be provided. Y

A great advantage of my new construction is the simplicity lof the construction of both the burner and mantle, eliminating mantle supports. The mantle, free of rings or other rigid pieces can be folded or rolled together in any suitable mannerV for shipment,

VJAnother advantage is the convenience with ts slipping over the top of the burner can be performed without touching it with the hands, .whereby soiling 'is avoided, and the life of the mantle prolonged.

YWhat I claim and desire to secureby Letters Patent is :g-r Y l; An incandescent gas lamp, comprising `a bunsen, an upright closed top-burnertube thereon, having a plurality ofburnerholes'" in its circumference anda central burner iole in itstop and an incandescent mantle loosely mounted over the closed-top of said burner tube,- so as to' extend around said burner holes and be capable of rising under the action of the gasissuing fromsaid 'central hole to be 'out of contact with said burner tube. s Y

2. An incandescent gas lamp, comprising a buns'en, a closed-top burner tube thereon, havinga plurality of burner holes in its cir cumference and a central hole in its top, and a closed 'top limp mantle loosely mounted over the closed top of said burner tube sonas to extend around said burnerholes and be capable of rising under the action of the gas issuing from said central hole to be out of contact with said burner tube. p

y 8. ln an incandescent' gas lamp, a closed top burner tube having burner holes in its circumferenceand a crater in its top, and a closed top incandescent limp mantle formed in the center of its topwith aA stiffened bunch, adapted to enter and rest in said crater when theY mantle is slipped over said burner tube and to thereby center' the `mantle on the latter.

4l. ln an incandescent gas lamp, a closed top burner tube having a plurality of burner openings arranged in its circumference Vin vertical rows of graduated size, and a closed top downwardly flaring mantle adapted to loosely lit over the top of said burner and to extend through like'zones of the different flames, tov produce ,a uniformly illuminated surface.

Intestimony whereof IV affix my signature in presence of two witnesses.

JACOB I. ROBIN.

' Witnesses: Y Y

MAX D. ORDMANN,

' Josnrn T. McMAHoN. 

